A bathing facility for relaxation with a public bath overlooking Lake Asagiri and a temperature-stable sauna with double doors
Ehime Seiyo City
Yutopia Uwa Onsen is a day-use hot spring facility surrounded by nature in Seiyo, Ehime Prefecture. From the large public bath you can take in the magnificent view of Lake Asagiri. The facility features a well-set dry sauna with double doors that prevent heat loss and a flowing cold plunge bath fed by a natural cold spring. The low-osmotic, alkaline cold mineral spring is known for its slightly slippery, viscous texture and is reputed to be excellent for skin beautification. There is also a local farmers' produce stall and a light meal corner, offering a homely atmosphere where you can soothe both body and mind.
TypeNatural Hot Spring
A hypotonic, alkaline cold mineral spring rising from 600 meters underground. When you soak in the water you can feel a distinctive slightly slippery and viscous texture, and it is loved locally as a "beauty spring" that leaves skin smooth after bathing. The water is warmed by an eco-friendly boiler fueled by wood pellets, and large glass windows allow you to enjoy views of Lake Asagiri's natural scenery while leisurely taking long soaks.
Sauna TypeDry Sauna
Stove Typefar_infrared
Capacity16people
A two-tier dry sauna using a gas far-infrared stove. Because the entrance has double doors, temperature drops from people coming and going are minimal, so the condition remains consistently stable, which is the facility's main feature. The room temperature exceeds 90°C, providing solid heat that warms you deeply. You can relax while watching TV and enjoy a good sweat on the relatively wide benches.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity3people
A deep cold plunge bath located just beside the sauna room. It uses high-quality cold spring water, giving it an exceptionally smooth and pleasant feel on the skin. The water is not excessively cold, and together with the mellow quality unique to a cold spring, you can slowly soak and gently cool your body. After the cold plunge, you can enjoy a seated cool-down on the relaxation chairs beside the tub and experience deep relaxation in the quiet surroundings.
Closed Days: None
6125 Akima, Uwa-cho, Seiyo-shi, Ehime 797-0010, Japan
Gender Access
Gender Separated
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more
A bathing facility for relaxation with a public bath overlooking Lake Asagiri and a temperature-stable sauna with double doors
Ehime Seiyo City
Yutopia Uwa Onsen is a day-use hot spring facility surrounded by nature in Seiyo, Ehime Prefecture. From the large public bath you can take in the magnificent view of Lake Asagiri. The facility features a well-set dry sauna with double doors that prevent heat loss and a flowing cold plunge bath fed by a natural cold spring. The low-osmotic, alkaline cold mineral spring is known for its slightly slippery, viscous texture and is reputed to be excellent for skin beautification. There is also a local farmers' produce stall and a light meal corner, offering a homely atmosphere where you can soothe both body and mind.
TypeNatural Hot Spring
A hypotonic, alkaline cold mineral spring rising from 600 meters underground. When you soak in the water you can feel a distinctive slightly slippery and viscous texture, and it is loved locally as a "beauty spring" that leaves skin smooth after bathing. The water is warmed by an eco-friendly boiler fueled by wood pellets, and large glass windows allow you to enjoy views of Lake Asagiri's natural scenery while leisurely taking long soaks.
Sauna TypeDry Sauna
Stove Typefar_infrared
Capacity16people
A two-tier dry sauna using a gas far-infrared stove. Because the entrance has double doors, temperature drops from people coming and going are minimal, so the condition remains consistently stable, which is the facility's main feature. The room temperature exceeds 90°C, providing solid heat that warms you deeply. You can relax while watching TV and enjoy a good sweat on the relatively wide benches.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity3people
A deep cold plunge bath located just beside the sauna room. It uses high-quality cold spring water, giving it an exceptionally smooth and pleasant feel on the skin. The water is not excessively cold, and together with the mellow quality unique to a cold spring, you can slowly soak and gently cool your body. After the cold plunge, you can enjoy a seated cool-down on the relaxation chairs beside the tub and experience deep relaxation in the quiet surroundings.
Closed Days: None
6125 Akima, Uwa-cho, Seiyo-shi, Ehime 797-0010, Japan
Gender Access
Gender Separated
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more